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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A

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12th Standard Chemistry English Medium - Organic Nitrogen Compounds 5 Mark Book Back Question Paper and Answer Key 2022 - 2023

Published on: 02/09/2022

QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Chemistry Subject - Organic Nitrogen Compounds, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 12th Standard - Chemistry

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Questions:

Generic 5

4 x 5 = 20

Identify A to E in the following sequence of reactions

\(\overset { {CH_3} {CL} }{ \underset { {AlCl}_3 }{ \longrightarrow } }\) A \(\overset { {HNO_3}/ {H_2So_4} }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { {Sn} /{HCL} }{ \underset {{} }{ \longrightarrow } }\) (C) \(\overset { {NaNo_2}/ {HCL} }{ \underset { {O^o}C }{ \longrightarrow } }\) D \(\overset { {CuCN} }{ \underset { {}}{ \longrightarrow } }\) E

A dibromo derivative (A) on treatment with KCN followed by acid hydrolysis and heating gives a monobasic acid (B) along with liberation of CO₂ . (B) on heating with liquid ammonia followed by treating with Br₂ /KOH gives (c) which on treating with NaNO₂ and HCl at low temperature followed by oxidation gives a monobasic acid (D) having molecular mass 74. Identify A to D.

Predict A,B,C and D for the following reaction

How will you distinguish between primary secondary and tertiary alphatic amines.

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Answers Key:

Generic 5

4 x 5 = 20

Compound A,B,C and D

S.No	Reagents or Reaction	Primary amine RNH₂	Secondary amine R₂NH	Tertiary amine R₃N
1.	Carbylamine reaction or with CHCl₃/KOH	Carbylamine is formed (unpleasant smell)	-	-
2.	Mustard oil reaction or CS₂/HgCl₂ (Hoffmann's mustard oil test)	Alkyl isothiocyanate is formed (Mustard oil odour)	-	-
3.	HNO₂ (or) NaNO₂/ HCl	Alcohol is formed +H₂	Yellow oily nitrosoamine is formed, insoluble in water. (Liberman's Test)	Forms nitrite in cold, soluble in water.
4.	CH₃COCl	N-acetyl derivative is formed	N,N- diacetyl derivative is formed	-
5.	Diethyl oxalate Hoffmann's method	Solid oxamide is formed	Liquid oxamic ester is formed	-
6.	Benzene sulphonyl chloride in presence of excess. KOH (Hinsberg's reaction)	N- alkyl benzene sulphonamide is formed (soluble)	N, N - dialkyl benzene sulphonamide is formed (Insoluble).	-
7.	With RX	1 mol → 2^o amine 2 mol → 3^o amine 3 mol → Quarternary salt	1 mol → 3^o amine 2 mol → Quarternary salt	1 mol → Quarternary salt